Search found 8 matches
- Fri Jun 12, 2020 7:29 pm
- Forum: Hardware and Tech
- Topic: 2 prong crazy stiff power switch
- Replies: 7
- Views: 2116
Re: 2 prong crazy stiff power switch
Maybe, but I worry that a lot of dissolved grease would stay in and foul the contacts, plus it would be full of liquid for a long time. I prefer to open the switch. Is it unsealed enough to drain easily?
- Thu Jun 11, 2020 10:55 pm
- Forum: Hardware and Tech
- Topic: 2 prong crazy stiff power switch
- Replies: 7
- Views: 2116
Re: 2 prong crazy stiff power switch
I had the exact same thing on my VIC-20. The reason it gets stiff is because the grease in the spring-loaded rocker plunger has stiffened into an extremely high viscosity glue over the decades. It will not cure itself; no matter how long you leave the switch ON, once you stop moving the switch for a...
- Tue Oct 22, 2019 12:21 pm
- Forum: Hardware and Tech
- Topic: Datasette motor control snafu
- Replies: 10
- Views: 4043
Re: Datasette motor control snafu
My gosh, there it is at the bottom of the page! I don't know how I missed it. Well, I think my scans are better quality at any rate.
- Mon Oct 21, 2019 12:56 pm
- Forum: Hardware and Tech
- Topic: Datasette motor control snafu
- Replies: 10
- Views: 4043
Re: Datasette motor control snafu
Mine has the most common C64-breadbin-style keyboard with the medium-brown function keys. I do wish it had the PET keyboard, they look so good. We had a PET in the corner of many of my 1st-5th gradeschool classrooms that nobody ever touched except for me. I have a schematic on my lap that shows thre...
- Sun Oct 20, 2019 6:40 pm
- Forum: Hardware and Tech
- Topic: Datasette motor control snafu
- Replies: 10
- Views: 4043
Re: Datasette motor control snafu
It is 2-prong, NTSC, with a two-compartment RF box. Here are the photos I took last time I had it out: https://photos.app.goo.gl/jWjd287HtowLS2Vw9 Not exactly archival grade - I will take another series with this in mind soon when I open it up to repair a stripped thread. One of the photos is a clos...
- Fri Oct 18, 2019 5:34 pm
- Forum: Hardware and Tech
- Topic: Datasette motor control snafu
- Replies: 10
- Views: 4043
Re: Datasette motor control snafu
I flipped through my VIC-20 books, and in one of them, found a fold-out schematic that matches my board! I haven't seen this particular version elsewhere on the web. I want to scan it and make it available. Where should I submit it to?
- Fri Oct 11, 2019 6:52 pm
- Forum: Hardware and Tech
- Topic: Datasette motor control snafu
- Replies: 10
- Views: 4043
Re: Datasette motor control snafu
It is the part number of the transistor that determined the order of the legs. Japan style 2S vs 2N order. The schematic called for 2N3904 / 2N4401 transistors, after tracing the circuit found that the arrangement of pads on the board were for ECB, if you were to just install them per the silkscreen...
- Fri Oct 11, 2019 2:48 am
- Forum: Hardware and Tech
- Topic: Datasette motor control snafu
- Replies: 10
- Views: 4043
Datasette motor control snafu
Last weekend, acquired a crate of commodore stuff including a beautiful two-pin VIC-20. I've been cleaning and inspecting it, and when I got around to cleaning up the datasette, to my amazement it works! Loads original tapes! Except.. The motor never stops running. Traced the issue to the VIC-20 mot...